... as said: stupid me
some months ago i was replacing the tail servo of my Logo 400SE (performance of the Savox 1290 was subpar)... the Futaba BLS 251 immediately cured the tail. better performance across all rpm range... good to very good in bank 1-2, excellent in bank 3. i was able to significantly raise the tail gain and reduce revo mix... especially in bank 3. much crisper stops, superprecise...
BUT i dont know who
but some dumbass did not change one important parameter for all banks - was just set for bank 3: rudder delay was still on 4 from Savox servo on bank 1+2... has to be set to 0 for BLS. noticed and changed the other day and tested today... now tail is excellent on all banks.
so - dont be so stupid as myself - never forget the advanced parameters for all banks when switching servos